# coding:utf-8

a_school = ['周五半天', '免费周末培训', '周五休息']
b_school = ['放学时间从6点改为5点', '作业少留点', '换舒服的座椅']
c_school = ['作业少留点', '周五半天', '伙食改善']

a_set = set(a_school)
b_set = set(b_school)
c_set = set(c_school)

print(a_set)
print(b_set)
print(c_set)

"""
union(*others)
set | other | ...
返回一个新集合，其中包含来自原集合以及 others 指定的所有集合中的元素。
"""
help_data = a_set.union(b_set, c_set)
print(help_data)
